html, body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Roboto, Noto, sans-serif;
    font-size: 12px;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
    -webkit-font-smoothing: antialiased;
    color: #333;
    text-justify: 100%;
    -webkit-tap-highlight-color: transparent;
    background: @background-grey;
    height: 100%;
}